Back to Search
Start Over
Probing biological activity through structural modelling of ligand-receptor interactions of 2,4-disubstituted thiazole retinoids.
- Source :
-
Bioorganic & medicinal chemistry [Bioorg Med Chem] 2018 May 01; Vol. 26 (8), pp. 1560-1572. Date of Electronic Publication: 2018 Feb 10. - Publication Year :
- 2018
-
Abstract
- Retinoids, such as all-trans-retinoic acid (ATRA), regulate cellular differentiation and signalling pathways in chordates by binding to nuclear retinoic acid receptors (RARα/β/γ). Polar interactions between receptor and ligand are important for binding and facilitating the non-polar interactions and conformational changes necessary for RAR-mediated transcriptional regulation. The constraints on activity and RAR-type specificity with respect to the structural link between the polar and non-polar functions of synthetic retinoids are poorly understood. To address this, predictions from in silico ligand-RAR docking calculations and molecular dynamics simulations for a small library of stable, synthetic retinoids (designated GZ series) containing a central thiazole linker structure and different hydrophobic region substituents, were tested using a ligand binding assay and a range of cellular biological assays. The docking analysis showed that these thiazole-containing retinoids were well suited to the binding pocket of RARα, particularly via a favorable hydrogen bonding interaction between the thiazole and Ser232 of RARα. A bulky hydrophobic region (i.e., present in compounds GZ23 and GZ25) was important for interaction with the RAR binding pockets. Ligand binding assays generally reflected the findings from in silico docking, and showed that GZ25 was a particularly strongly binding ligand for RARα/β. GZ25 also exhibited higher activity as an inducer of neuronal differentiation than ATRA and other GZ derivatives. These data demonstrate that GZ25 is a stable synthetic retinoid with improved activity which efficiently regulates neuronal differentiation and help to define the key structural requirements for retinoid activity enabling the design and development of the next generation of more active, selective synthetic retinoids as potential therapeutic regulators of neurogenesis.<br /> (Copyright © 2018 The Authors. Published by Elsevier Ltd.. All rights reserved.)
- Subjects :
- Dose-Response Relationship, Drug
Humans
Ligands
Models, Molecular
Molecular Structure
Receptors, Retinoic Acid metabolism
Retinoids chemistry
Structure-Activity Relationship
Thiazoles chemistry
Tumor Cells, Cultured
Receptors, Retinoic Acid antagonists & inhibitors
Retinoids pharmacology
Thiazoles pharmacology
Subjects
Details
- Language :
- English
- ISSN :
- 1464-3391
- Volume :
- 26
- Issue :
- 8
- Database :
- MEDLINE
- Journal :
- Bioorganic & medicinal chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 29439915
- Full Text :
- https://doi.org/10.1016/j.bmc.2018.02.002